5.7.1.2.Required Protection

(1) The building shall be located, the building site shall be graded, or surface water shall be directed away from building assemblies so as to (a) minimize the accumulation of surface water against the building in a manner that does not adversely affect adjacent buildings or properties, or (b) accommodate the accumulation of surface water on the property in a manner that does not adversely affect the building or adjacent buildings or properties. (2) Drainage shall be provided to direct surface water away from building assemblies separating interior space from the ground, except, (a) where the building assembly is designed in accordance with Subsection 5.7.2. to withstand continuous hydrostatic pressure, or (b) where it can be shown that the lack of drainage will not adversely affect any of (i) the health or safety of building users, (ii) the intended use of the building, or (iii) the operation of building services. (See Note A-5.7.1.2.(2))